He will find terrible place (4)
I believe the answer is:
hell
'terrible place' is the definition.
'hell' can be an answer for 'place' (I have seen 'Infernal place' mean 'hell' so perhaps 'place' could also mean 'hell'). I am unsure of the 'terrible' bit.
'he will' is the wordplay.
'will' becomes 'll' (contracted form, as in 'he'll' - 'he will').
'he'+'ll'='HELL'
'find' acts as a link.
Can you help me to learn more?
(Other definitions for hell that I've seen before include "Abode of the forces of evil" , "Tartarus, of myth" , "Nasty situation" , "Place of vice, misery or turmoil" , "Place of suffering" .)